Photoluminescence and absorption identification of Ti3 in zinc telluride
| Autor: | Jun Shao, Xiaoguang Wang, Enno Baars, Achim Dörnen, Junhao Chu |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
education.field_of_study
Photoluminescence Zinc telluride Absorption spectroscopy Phonon Chemistry Population Analytical chemistry Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry.chemical_compound Excited state Materials Chemistry Electrical and Electronic Engineering Absorption (electromagnetic radiation) education Ground state |
| Zdroj: | Semiconductor Science and Technology. 17:1213-1217 |
| ISSN: | 0268-1242 |
| DOI: | 10.1088/0268-1242/17/12/302 |
| Popis: | Low-temperature photoluminescence (PL) and optical absorption are carried out on a Ti-doped ZnTe bulk crystal with carefully optimized experimental conditions. The influence of excitation energy in the PL is checked. Two zero-phonon lines (ZPLs) are clearly identified and phonon sidebands are evidenced in the PL and in the absorption, respectively. A relation is established between the PL and the absorption for the intensity ratio of the two ZPLs. Thereby, the Ti ion is identified as Ti3+ and the ZPLs in the PL spectrum are from the Γ7 and Γ8 levels of the 2T2 excited state to the well-separated Γ8 level of the 2E ground state. The separation of the two excited levels is 2.4 cm−1. The population numbers are shown to be fully thermalized in the 2T2 excited state in the PL process. |
| Databáze: | OpenAIRE |
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